Ameter scale is placed along the axis of convex mirror of focal length 25 cm , it’s nearer end being

Ameter scale is placed along the axis of convex mirror of focal length 25 cm , it’s nearer end being at a distance of 50 cm. calculate the size of image formed.​

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  1. The mirror formula :

    1/f = 1/u + 1/v

    u = image distance

    v = object distance

    f = focal length

    Now :

    v = 50 cm

    f = 25 cm

    1/25 = 1/50 + 1/u

    1/u = 1/25 - 1/50

    1/u = 1/50

    u = 50 cm

    Magnification :

    Image distance / object distance

    50/50 = 1

    Size of image :

    1 meter × 1 = 1 meter

    = 1 meter

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